The self-expanding anchor bolt, also known as the self-cutting anchor bolt, is a reaming type mechanical anchor bolt with a relatively simple construction method, and is mostly used for anchoring between concrete and other high-load structural members. In fact, the self-expanding anchor bolts in construction are often used to replace the rear-expanded anchor bolts (post-cut anchor bolts).

The construction method of the rear-expanded anchor bolt is complicated. We often receive complaints that the anchor bolt is very low. When we rushed to the scene, we found that only the straight hole was punched and the hole was not reamed. Not even as good as an expansion anchor. In the past two years, the emergence of self-expanding anchor bolts has solved this problem very well. The self-expanding anchor bolts have been specially cut into the design, and the electric installation tool can easily cut the concrete to achieve mechanical locking without reaming. Effect. Moreover, because it does not need to ream the hole itself, the probability of hitting the hole is smaller than that of the rear expansion. In actual use, the M20 self-expanding bottom anchor may be used, but the rearward expansion of the M20 is basically not used. Anchor bolt.

The construction steps of the self-expanding anchor bolt are as follows:

(1) drilling a hole of corresponding diameter and depth using a straight hole drill;

(2) Use a soot blower to align the hole to blow dust until there is no dust in the hole;

(3) Use the hammer drill and the corresponding installation tool to hammer down the self-expanding anchor bolt sleeve so that the bottom is expanded to complete the anchoring.

Taihao Warehouse Haojing Technology Co., Ltd. is located in No. 188, Luxin Road, Taicang City. It is a professional manufacturer of expansion screws.